Description: The WIFI module is a good replacement for the old one. Wireless standards: 802.11 b / g / n. Frequency: 2.4GHz. Better signal output, whether it is stability or anti-jamming capability. ESP8266-12F is an enhanced version of ESP8266-12, perfect peripheral circuit, four-layer board technology, enhanced impedance matching. Enhanced version is fully compatible with the firmware before the pin in the ESP-12 on the basis of the addition of six IO port, SPI port leads, the development more convenient. Specifications: Material: metal. Size: 16*24mm. Color: show as pictures. Wireless standards: 802.11 b / g / n. Frequency: 2.4GHz.